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(No Model.)

4 Sheets-Sheet 1. P. SOHEIDIG'.

MAGIG LANTERN.

No. 449,386. Patented Mar 31,1891.

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(No Model.)

P. SGHEIDIG. MAGIC LANTERN.

No. 449,386. Patented Mar. 31, 18 91.

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P. SOHEIDIG. MAGIC LANTERN.

No. 449,886. Patented Mar. 31, 1891.

WITNESSES:

(N0 Mddel.) 4 sheets-sheet 4.

F. SOHEIDIG. MAGIC LANTERN,

No. 449,386. Patented Mar. 31,1891.

WITNESSES. IIVVE/VTOH:

ATT R/V UNITED STATES PATENT OFFICE;

FREDERICK SOHEIDIG, OF NEV YORK, N. Y.

MAGIC LANTERN.

SPECIFICATION forming part of Letters Patent No. 449,386, dated March 31, 1891.

Application filed November 20, 1890. Serial No. 372,006. (No model.)

1'0 all whom it may concern.-

Be it known that I, FREDERICK SCHEIDIG, a citizen of the United States, residing in the city, county, and State of New York, have invented a new and useful Improvement in Magic Lanterns, of which the following is a specification.

This invention relates to the construction of stereopticans and similar lanterns; and its objects are to provide for the use of the lanterns either in pairs as a stereoptican, or singly, as desired; to facilitate the removal of the rear condensenlens, as in case of breakage from its proximity to the light; to provide against wear of or injury to the bellows; to make the instrument, and particularly the light-inclosing case, more easily and compactly folded, as for transportation; to more completely inclose the light than hereto fore, and to provide for an easier and better adjustment of the illuminating device with respect to the condenser.

The invention by which these objects are attained comprises various novel devices and combinations of devices, substantially as hereinafter set forth and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which Figure 1 represents a side elevation of a stereoptican embodying the primary features of my invention. Fig; 2 represents a longitudinal sectional elevation of one of the lanterns comprising the same. Fig. 3 represents a sectional plan of a part of the said lantern on the line X X, Fig. 2. Fig. 4 is a cross-sectional view on the line Y Y, Fig. 3. Fig. 5 is a sectional plan view representing part of the condenser-shell and the light-hood when folded. Fig. 6 is a side, partly sectional, elevation of a lantern like those illustrated in the previous figures, except as to the burner, which is provided with a novel form of adjusting device. Fig. 7 is a cross-sectional view of the same on the line V V, Fig. 6. Fig. 8 is a cross sectional view on the line \V W, Fig.6. Fig. 9 is a side elevation of a lantern embodying some of the features of my in vention, but provided with an oil-burner.

Like letters of reference designate corresponding parts in the various figures.

Each of the superposed lanterns shown in Fig. 1, in use as a stereopticon, and represented in detail in Figs. 2, 3, a, and 5, is constructed alike, the frame of each comprising a front standard A, in which an ordinary objective B is held, and to the back of which are fixed longitudinal slide-rods C and a rear standard D, rigidly mounted on longitudinal tubular guides E, in which the rods 0 slide, for adjusting the front and rear standards to and from each other in a well-known manner.

'In the top of both the front and rearstandards A D of each lantern are formed steps F, and in the bottom of the said standards AD of each lantern are screws G, which are adapted to rest as feet in the steps F of the other lantern when used as astereopticau, as in Fig. l, or when either lantern is to be used by itself can be instantly lifted out of said steps F and rested on a table or other support, and in either case can be readily adjusted vertically to point the objective or objectives at the desired place. It will be seen that both lanterns being alike can be used interchangeably as the upper and lower lanterns.

The condenser-shell of each lantern is made in two transverse sections H H, the rear section H fixed at its back to the rear standard D and open in front to receive the rear lens I, which is held removably in place therein by lugs J, and a spring-arm J, attached to said shell-section and bearing on the front of the lens, and the front shell-section H, open in rear to receive the front lens K and fixed in front to the slide-holder frame L, which, with the said front shell-section, is fixed upon slide-tubes M, mounted to slide lengthwise 011 the tubular guides E. With this construction, the front lens-holding shell-section H can be readily separated by sliding it forward with the slide-holder frame L from the rear lens-holding shell-section H, to give convenient access to the rear lens I and allow of its removal and replacement by another, as in case of breakage from its proximity to the light without disturbing the rest of the instrument. Furthcr,.the sectional character of the condenser-shell prevents the transmission of heat from the illuminating device to the front lens-holding section, and hence saves the front lens from danger of breakage therefrom.

The slide-tubcs M are provided with binding-screwsN for clamping them to the tubular guides E, so that the front shell-section H, with the attached slide-holder frame, can be firmly held in place either when separated from or close to the rear shell-section ll. The slid e-tubes M are also provided with binding-screws 0 bearing on the slide-rods C of the objective, which, when the slide-tubes M are clamped to the guides E, serve the purpose of securing the objective in its longitudinal adjustment with respect to the condenser.

The slide-holder frame L and the front standard A are formed with recessed frames P P for receiving the ends of the bellows Q, the ends of said bellows surrounding and fastened to inner frames R, which are socured with the bellows ends within the recesses of the frames P, so tha the edges of the bellows are protected from injury and wear. 7

On the ends of the tubular guides E, behind the rear standard D, is received removably and adjustably an ordinary saddle S, on which an oxyhydrogen-burner S, which is here used as the illuminating device, is adjustable vertically in an ordinary manner for focusing the light.

The hood T for iuclosing the illuminating device is constructed of side plates T, hinged to the respective sides of the rear standard D, so as to fold inward against the same, and having peep-doors T back plates T hinged to the rear edges of the side plates T, so as also to fold inward against the standard D, and having a catch T for locking them to getheir when opened, and an apertured top plate T hinged to the standard D, so as to fold downward and inward upon the same, and having its draft-aperture covered by an elevated plate U to include the light.

A yielding catch V is provided on the top plate to engage a detent on the top of the standard D for sustaining thetop plate when raised. This hood being capable of being folded into a very small space, as indicated in Fig. 5, renders the lantern extremely port-* able.

To include the light at. the bottom of the hood T, an apertured plate \V, covering the bottom of the hood and havinga'longitudinal slot V, to accommodate the upright parts of the burner S, is held removably in aligned slot-s W formed in opposite sides of said upright parts of the burner.

The lantern illustrated in Figs. 6, 7, and S is like those hereinbefore described, exceptas to the novel arrangement for adjusting its burner, which is an oXyhydrogen-burner, as before. The burner S is here itself received and adjustable lengthwise on guiderods S carried by and projecting rearwardly from a transverse plate S which is mounted to slide vertically on the back of the rear standard D. Headed set-screws 5' project from the standard D through vertical slots 8'' in the plate S, to guide the plateiu its vertical movement and serve for clamping the plate in place when properly adjusted. A transverse shaft S, having a turning head at the side of the lantern, is mounted in bearings S on the plate S and carries a pinion S, which projects through an opening S in said plate and engages a vertical toothed rack S fixed on the standard D, so that by turning the shaft S the plate S and hence the burner, can be'easily and accurately adjusted in a vertical direction, while the burner itself is readily adjusted horizontally on the rods 8", as before stated.

The lantern illustrated in Fig. 9 has substantially the same novel arrangement of sectional condenser-shell and bellows-frames as before described, but is provided with an oilburner, the hood o of which is attached to the back of the standard D.

I claim as my inventionl. A stereopticon comprising two similar lantern-frames, both provided on the bottom with feet and both on the top with feet-engaging steps, the feet and steps of each fitting the steps and feet, respectively, of the other, substantially as shown and described.

2. In a stereoptioon, the combination, substantially as hereinbefore set forth, of two superposed lantern-frames, each comprising front and rear standards provided both with adjustable screw-feet and on top with steps, the screw-feet on both the front and rear standards of the upper lantern fitting into the steps on the front and rear standards of the lower lantern.

The combination, substantially as hereinbefore set forth, with the lantern-frame, of two separate condenser-shell sections mounted on the frame, one section carrying the front lens and the other section the rear lens,

the two said sections and their lenses being I wholly disconnected save through their mountings on the frame.

4:. The combination, substantially as hereinbefore set forth, with the lantern-frame, of two independent condenser-shell sections, one mounted on the frame and the other shellsection carried by a slide which is free to work lengthwise on the frame.

5. The combination, substantially as herein before set forth, with the lantern-frame, of two separate condenser-shell sections, each carrying one lens and each section with its lens having an independent mounting on the frame, the front section being mounted to slide with its lens to and from the rear section and lens.

(5. The combination, substantially as hereinbefore set forth, with the separable lensholding sections of the condenser-shell of the lantern, and the rear lens resting against the back of the rear shell-section, of aspring-arm on the rear shell-section bearing on the front of said rear lens.

7. The combination, substantially as hereinbefore set forth, with the lantern-frame, of

two separate condenser-shell sections having independent mountings on the frame, one shell-section being mounted to slide to and from the other, and a binding-screw to hold the said sliding section in place.

8. The combination, substantially as hereinbefore set forth, with thelantern-frame having longitudinal guides, of a condenser-shell comprising two separable lens-holding sections, one of which is mounted on the frame and the other section carried by tubular slides working on the said guides.

9. In a lantern, the combination, substantial] y as hereinbefore set forth, with the bellows adj ustably connecting the condenser with the objective, of a frame for the end of the bellows, comprising an inner frame which the end of the bellows surrounds, and an outer frame, within a recess in the face of which both the inner frame andthe end of the bellows are secured.

10. The combination, substantially as here inbcfore set forth, with the condenser-standard of the lantern-frame, of hood, side, and top plates hinged to the standard, and hood back plates hinged to said side plates, so that side, top, and back plates can all be folded flatwise against the standard.

11. The combination, substantially as hereinbefore set forth, with the condenser-stand-.

and through which it projects.

12. The combination, substantially as here inbei'ore set forth, with the condenserstandard of the lantern-frame, of the hood-top plate hinged thereto, and a spring-catch to engage and sustain the top plate as it is swung upward.

13. Theeombination, substantially as herebefore set forth, with the lantern-frame having vertical guides, of a'burner-carrier working on said guides, a burner adjustable horizontallyon the burner-carrier, and a rack-and pinion gear for raising and lowering the burner-carrier.

14. The combination, substantially as hereinbefore set forth, with the lantern-frame comprising a standard D, of a burner-carrier consisting of a vertically-slotted plate with horizontal burner-guides mounted to slide vertically on the standard D, a burner adj ustable horizontally on said guides on the carrier, means for raising-and lowering the burnercarrier, and set-screws projecting from the standard D through the vertical slots in the carrier-plate.

15. The combination, substantially as he reiubefore set forth, with the lantern-frame comprising a standard D and the condenser, of a burner-carrier comprising a plate 8*, sliding vertically on the standard D and having an opening S a shaft 8, carrying a pinion S and a toothed rack S FREDERICK SOHEIDIG.

\Vitne'sses H. G. HINTON, WM. E. MINER. 

